Genus
Protocyclendoceras Balashov, 1968
Aiheeseen liittyvät julkaisut
Balashov, Z. G. 1968. Èndoceratoidei ordovika SSSR. pp. 1-277. Izdatel'stvo Leningradskogo Universiteta.
List of species
1. Protocyclendoceras balticum Balashov, 1968 | Kunda Stage
2. Protocyclendoceras iruense Balashov, 1968 | Kunda Stage
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Luokittelu
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Mollusca |
| Class | Cephalopoda |
| Subclass | Orthoceratia |
| Order | Endoceratida |
| Family | Cyrtendoceratidae |
| Genus | Cyclocyrtendoceras |
| Cyrtendoceras | |
| Protocyclendoceras | |
| Species | balticum |
| iruense |